UPD70F3738GF-GAS-AX Renesas Electronics America, UPD70F3738GF-GAS-AX Datasheet - Page 861

• Manufacturer Part Number: UPD70F3738GF-GAS-AX
• Description: MCU 32BIT V850ES/JX3-L 100-LQFP
• Manufacturer: Renesas Electronics America
• Series: V850ES/Jx3-Lr

Specifications of UPD70F3738GF-GAS-AX

• Core Processor: RISC
• Core Size: 32-Bit
• Speed: 20MHz
• Connectivity: CSI, EBI/EMI, I²C, UART/USART
• Peripherals: DMA, LVD, PWM, WDT
• Number Of I /o: 84
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 2.2 V ~ 3.6 V
• Data Converters: A/D 12x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

23.9.2 RTC backup mode setting conditions
(2) Subclock low-power operation control register (SOSCAMCTL)
(1) Setting conditions for RTC backup mode
(2) Exiting conditions for RTC backup mode
Caution Be sure to set bits 7 to 1 to “0”.
Remark
The SOSCAMCTL register is used to select the low-power control method of the subclock (f
power operations in the RTC backup mode. This register is a special register that can only be written in a
specific sequence (see 3.4.7 Special registers).
This register can be read or written in 8-bit or 1-bit units.
This register is cleared to 00H when a power-on reset operation is executed for RV
If the following condition is satisfied, the RTC backup mode is set.
If the following condition is satisfied, the RTC backup mode is released.
<1> RTCBUMCTL0.RBMEN = 1 (Using RTC backup mode is enabled.)
<2> SOSCAMCTL.AMPHS = 1 (This setting is necessary for subclock (fXT) oscillation in the ultra low
<3> RTCBUMCTL0.RBMSET = 1 (RTC backup mode setting.)
<1> SOSCAMCTL.AMPHS = 0 (the normal oscillation of the subclock.)
<2> RTCBUMCTL0.RBMSET = 0 (RTC backup mode exiting.)
SOSCAMCTL
easily cause the incorrect number of oscillation cycle counting. Before deciding to use this mode,
thoroughly evaluate the effects of noise.
When the subclock (f
After Reset: 00H
AMPHS
0
1
0
7
XT
) is oscillating in the ultra low consumption mode, the effects of noise can more
Normal oscillation
Ultra low consumption oscillation
R/W
CHAPTER 23 STANDBY FUNCTION
6
0
consumption mode, but the setting is not necessary for the RTC backup
mode.)
User’s Manual U18953EJ5V0UD
Address:
5
0
Subclock (f
FFFFFB03H
4
0
XT
) oscillator mode select
3
0
2
0
1
0
DD
.
AMPHS
<0>
XT
) to perform low-
859